In this case, for example, the Head Start program would serve about 100,000 fewer children and the Low-Income Home Energy Assistance Program would lose $271 million out of a budget of $3.4 billion.

Then there are the tax hikes. "It is striking how large some of the (tax) increases are," said Roberton Williams, a senior fellow at the Tax Policy Center, which is a think-tank jointly run by the Brookings Institution and the Urban Institution, The Wall Street Journal reported Monday.

Wealthier Americans will pay more in total, but less in terms of a percentage of their income, the Journal said.

Households earning $10,000 to $20,000 stand to lose between $68 and $605 if the "fiscal cliff" comes to pass.

Couples earning between $10,000 and $20,000 that have a child would see a much more substantial difference, as they would lose $1,324 out of a $2,761 in tax rebates and credits.

In the next bracket up from that, couples with a child earning between $20,000 and $30,000 would owe an average of $1,408 in federal income tax, a shift from the current rules in which they would be paid an average of $15.

On the other side of the income spectrum, those earning $1 million or more would see a tax hike of 24 percent. The average tax bill for those earning more than $1 million would climb by $200,000 the Journal said.

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